How tall are you in bananas? How much do you weigh in bowling balls? Find out — then share with friends.
Human beings are remarkably bad at understanding large measurements intuitively. Tell someone the Eiffel Tower is 324 meters tall and they will nod politely without forming any real mental image. Tell them the Eiffel Tower is about 1,700 bananas tall and something clicks. The banana provides a mental anchor — a thing people have held, squeezed, and measured — and suddenly the abstract number has physical weight. This is not a quirk of education or intelligence; it is how human cognition processes scale. We understand size through comparison to things we have direct physical experience with, not through arbitrary metric or imperial units that we happen to have memorized conversions for.
Cognitive scientists call this process "embodied cognition" — the phenomenon whereby abstract ideas are processed through concrete physical experience. When you learn that you are 10.8 bananas tall, your brain cross-references this with every banana you have ever held, and the number acquires genuine visceral meaning. When you learn you weigh 8.1 bowling balls, every time you have ever picked up a bowling ball contributes to your understanding of your own mass in a way that "160 lbs" — a number you have known for years — never quite achieves. Weird units work precisely because they are familiar in a direct, tactile way that official measurement systems are not.
This is why weird unit comparisons have become a reliable form of science communication and viral content. NASA regularly publishes press releases describing distances in terms of football fields. Scientists use the "Library of Congress" as an informal unit of data storage. Astronomers translate cosmic distances into the time it would take to drive there at highway speed. Nutritionists describe calorie counts in terms of Big Macs. None of these units are scientifically rigorous, but all of them dramatically improve public comprehension — because comprehension requires comparison to something familiar, not memorization of a number.
| Landmark | Official height | In bananas | In school buses | In giraffes |
|---|---|---|---|---|
| Eiffel Tower | 324 m | 1,701 | 29.5 | 59.0 |
| Empire State Building | 443 m | 2,327 | 40.4 | 80.7 |
| Statue of Liberty | 93 m | 489 | 8.5 | 16.9 |
| Great Pyramid of Giza | 139 m | 730 | 12.7 | 25.3 |
| Big Ben (Elizabeth Tower) | 96 m | 504 | 8.7 | 17.5 |
| Leaning Tower of Pisa | 56 m | 294 | 5.1 | 10.2 |
Research by psychologists at the University of Michigan found that people who receive numerical information alongside an intuitive comparison unit (e.g., "the distance is 2.3 football fields") demonstrate significantly higher retention and more accurate recall of the information one week later compared to people who receive the raw number alone. The comparison unit does not just help in the moment — it creates a lasting mental model that makes the information accessible for future reasoning. This is why science educators increasingly use "weird unit" comparisons deliberately, not as jokes or simplifications, but as cognitive scaffolding that helps abstract information stick.
Among all informal measurement units, the banana has achieved an unusual degree of semi-official status in science. In radiation physics, the "banana equivalent dose" (BED) is a real informal unit representing the radiation exposure from eating one banana — approximately 0.0000001 Sieverts. The unit exists because bananas contain significant amounts of naturally occurring potassium-40, a radioactive isotope. The BED is used to help the public understand low-level radiation exposure in context: a dental X-ray is about 500 banana equivalent doses; a chest X-ray about 4,000. In length, the average banana's 7.5 inches makes it a convenient unit for heights in the 5-to-7 foot human range, producing intuitively meaningful numbers like "I'm 11.2 bananas tall" rather than sub-1 fractions of a school bus or a fraction of a giraffe.
Informal measurement units with colorful names have a long and legitimate history in science, engineering, and everyday life. Many official measurement units originated as weird units — direct references to physical objects or body parts that happened to be widely available as comparison tools. The foot was originally the length of a human foot. The inch was the width of a thumb. The yard was the distance from King Henry I's nose to his outstretched fingertip. The acre was the area a team of oxen could plow in one day. These "weird" origins eventually became standardized, but they share the same cognitive logic as modern banana measurements: anchoring abstract measurement to direct physical experience.
Beyond informal use, unusual units appear regularly in legitimate scientific communication when they serve comprehension better than official units. Astronomers use the "astronomical unit" (AU) — the average distance from Earth to the Sun — as a standard measure for solar system distances, because it produces intuitive numbers (Jupiter is 5.2 AU from the Sun) rather than incomprehensibly large kilometer or mile figures. Nuclear physicists use the "barn" (10^-28 square meters) because it was originally described as "as big as a barn" compared to the tiny nuclear cross-sections being measured. The "smoot" — 5 feet 7 inches, the height of MIT student Oliver Smoot — was used to measure the Harvard Bridge in 1958 and remains officially marked on the bridge today.
Animals are particularly effective informal measurement units because they occupy the same physical world as the things being measured, and because most people have direct experience with their scale. The blue whale, at approximately 100 feet long and 150 metric tons, provides an intuitive reference for large ships and structures. The African elephant at approximately 13,000 pounds gives a vivid reference for vehicle and machine weights. The golden retriever — approximately 65 pounds, 25 inches at the shoulder, and 25 inches long — is particularly useful for human-scale measurements because it occupies the same size range as most people in terms of weight, making it immediately relatable. "I weigh 2.5 golden retrievers" is a statement that triggers genuine mental visualization in a way that "I weigh 70 kilograms" simply does not.
| Object | Official weight | In bowling balls | In golden retrievers | In elephants |
|---|---|---|---|---|
| Average human (160 lbs) | 72.6 kg | 10.7 | 2.5 | 0.013 |
| Smart car | 835 kg | 122.8 | 28.5 | 0.15 |
| Elephant | 5,443 kg | 800.4 | 185.5 | 1.0 |
| Blue whale | 150,000 kg | 22,059 | 5,111 | 27.6 |
| Eiffel Tower (iron) | 7,300,000 kg | 1,073,529 | 248,837 | 1,342 |
What makes weird unit comparisons so universally effective across cultures and age groups is that they sidestep the learned, arbitrary nature of official measurement systems. Whether a person grew up with metric or imperial, they have held a banana, petted a dog, and seen a bowling ball. These objects carry genuine physical memory that no unit symbol can replicate. A child who does not yet know what a kilogram is can immediately understand "that weighs as much as three golden retrievers." An adult who has never internalized what 300 meters looks like can immediately picture "the Eiffel Tower is about 1,700 bananas tall." The weird unit converter is not a replacement for standard measurement — it is a translation layer between numbers and genuine human understanding, and that is why it works.